22640007 has 8 divisors (see below), whose sum is σ = 32508784. Its totient is φ = 13932288.

The previous prime is 22639987. The next prime is 22640053. The reversal of 22640007 is 70004622.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22640007 - 2⁶ = 22639943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22640207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290218 + ... + 290295.

It is an arithmetic number, because the mean of its divisors is an integer number (4063598).

Almost surely, 2^22640007 is an apocalyptic number.

22640007 is a deficient number, since it is larger than the sum of its proper divisors (9868777).

22640007 is a wasteful number, since it uses less digits than its factorization.

22640007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580529.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 22640007 is about 4758.1516369279. The cubic root of 22640007 is about 282.8951610901.

Adding to 22640007 its reverse (70004622), we get a palindrome (92644629).

The spelling of 22640007 in words is "twenty-two million, six hundred forty thousand, seven".